New Rare Earth Element Abundance Distributions for the Sun and Five r-Process-Rich Very Metal-Poor Stars
Abstract
We have derived new abundances of the rare earth elements Pr, Dy, Tm, Yb, and Lu for the solar photosphere and for five very metal-poor, neutron-capture r-process-rich giant stars. The photospheric values for all five elements are in good agreement with meteoritic abundances. For the low-metallicity sample, these abundances have been combined with new Ce abundances from a companion paper, and reconsideration of a few other elements in individual stars, to produce internally consistent Ba, rare earth, and Hf (56 <= Z <= 72) element distributions. These have been used in a critical comparison between stellar and solar r-process abundance mixes.
- Publication:
-
The Astrophysical Journal Supplement Series
- Pub Date:
- May 2009
- DOI:
- arXiv:
- arXiv:0903.1623
- Bibcode:
- 2009ApJS..182...80S
- Keywords:
-
- atomic data;
- stars: abundances;
- stars: individual: CS 22829 ─ 052 CS 31082 ─ 001 HD 115444 HD 221170 BD+17 3248;
- stars: Population II;
- Sun: abundances;
- Astrophysics - Solar and Stellar Astrophysics;
- Astrophysics - Galaxy Astrophysics
- E-Print:
- 48 pages, 11 figures, 12 tables: To appear in the Astrophysical Journal Supplement
